Update CMake build.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140462 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/CMakeLists.txt b/lib/Sema/CMakeLists.txt
index 3766439..4ff92b1 100644
--- a/lib/Sema/CMakeLists.txt
+++ b/lib/Sema/CMakeLists.txt
@@ -8,6 +8,7 @@
   DelayedDiagnostic.cpp
   IdentifierResolver.cpp
   JumpDiagnostics.cpp
+  MultiInitializer.cpp
   Scope.cpp
   Sema.cpp
   SemaAccess.cpp